IODINE SORPTION ON CELLULOSE FIBRES

Equilibrium sorption isotherms of iodine on cellulose fibres have been determined in an aqueous solution in the presence of potassium iodide at 25°C. It was found that the sorption isotherms give the familliar curves obeying Langmuir equation so the parameters of this equation could been used to measure the degree of crystallinity and accessibility.This method is not convenient as a measure of estimation for estimating the degree of crystallinity, but is usefull to detect the variation in the fine structure of the freshly regenerated cellulose gel when it is dried or stretched.